CHA Datasheet – SIP 8 Pin, uPCHA, Protector IC – NEC, uPCHA datasheet, CHA pdf, CHA pinout, CHA manual. CHA Datasheet PDF Download – UPC, CHA data sheet. Work as either latching function or automatic resetting function by using pin 3. (In both overload detection and output offset detection, either function can be.

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Hello Simonov, I am wonderig how did you compute resistors for first schematic over current protection? Any commercial usage is prohibited.

Contact For Free Shipping. A wide variety of new original cha options are available to you, such as drive f1237ha, voltage regulator, and logic ics. Upcha Integrated Circuit Ic. It was in fact used in many industry amplifiers.

This is the threshold. However those were using small current relays not suitable for more powerful amplifiers. The buyer is responsible for any tax or duty charged on their country.

CHA new original electronics component ic. Your email address will not be published.

uPC Amplifier/Speaker Protection Module – DIY AUDIO BLOG, AUDIO WORKSHOP

Those can be quite bulky so the PCB is quite large. Using uPC for over current protection allows the designer to drop the SOA limiting elements in the power amplifier.

Hi Andrew, the IC can c11237ha work at this power supply. The supplier supports Trade Assurance — A free service that protects your orders from payment to delivery. There is a solution around this however, if you can provide a low power auxiliary voltage of about 18VAC. Supplier Types Trade Assurance. The mounting pads are of 15mm diameter. A few words about the PCB. There are 54 new original cha suppliers, mainly located in Asia.


Because not all of them are written in he schematic? But can you write all resistor values? Rising the voltage above 0. Learn how your comment data is processed. This part of the schematic is forcing the current to stay datashset the recommended SOA of the devices. Gold Plus Supplier The supplier supports Trade Assurance — A free service that protects your orders from payment to delivery.

CHA Datasheet PDF NEC => Renesas Technology –

Those can be drilled to a larger diameter if necessary. Leave a Reply Cancel reply Your email address will not be published.

This site uses Akismet to reduce spam. One important aspect is that this IC could be used to prevent the output devices from over current. Almost any Sony amplifier starting from the lower range and right up to the higher-end ES series are using this chip.

You can ensure product safety by selecting from certified suppliers, including 2 with ISO certification. According to the datasheeh pin 1 must be driven above 0.

uPC1237 Amplifier/Speaker Protection Module

Using a current source will require the pin 1 driven with current above uA. Hi, some of the resistor values depend on the supply voltage.


This will save space on the PCB, lower the cost of the project and increase the reliability. The relay is located between the mounting pads to keep the paths equal and at the same length. Datawheet Ventsislav greetings please can you share schematic even if low voltage one warm regards andrew.

Hi, the circuit does work. The mounting holes datashert at 5. Original Electronic Components cha. It can be downloaded HERE.

ratasheet About product and suppliers: The devices protected by this module can be quite expensive so no cheap tricks here. Upc Speaker Protection Board. Relevancy Transaction Level Response Rate.

However all you need is to monitor the current flow trough one of the emitter resistors at the output of the power amplifier. Most power amplifiers have a dedicated circuit built in them, to monitor the current flow trough the power transistors. My speaker terminals have 5mm threads and fit just fine. We will provide you with the best quality and most cost-effective products. Office Equipment Front Office Equipment. I am wondering if this works for you Ventsislav? Thanks for posting such a nice speaker protection with really high class chip.

Now the schematic of the module itself.